I am an energy-guzzling American and even for me 24.5C seems crazy in the winter time. That's 76F! My elderly grandmother (who has circulation issues and so is always cold) keeps her heat at 72F. Why would anyone want to wear shorts indoors when they will have to change them anyway to leave the house while it's 10F (-12C) outside? Seems like you're just wasting energy to inconvenience yourself?